学步园

 系统加载时执行的类，也是我们将需要加载的参数配置的地方 。必须实现 ServletContextListener

package com.chain.store.mutual;</p> <p>import javax.servlet.ServletContext;<br /> import javax.servlet.ServletContextEvent;<br /> import javax.servlet.ServletContextListener;</p> <p>import org.springframework.context.ApplicationContext;<br /> import org.springframework.web.context.WebApplicationContext;<br /> import org.springframework.web.context.support.WebApplicationContextUtils;</p> <p>import com.chain.store.bean.SystemParamBean;<br /> import com.chain.store.service.impl.SystemParamServicesImpl;</p> <p>public class LoadConfiguration implements ServletContextListener {<br /> private static final long serialVersionUID = 1L;<br /> //private SystemParamServicesImpl sysParamService;<br /> private static WebApplicationContext springContext;<br /> private SystemParamBean sysBean ;<br /> private ServletContext context;</p> <p> public LoadConfiguration(){<br /> super();<br /> }</p> <p> public void contextDestroyed(ServletContextEvent sce) {<br /> System.out.println("系统停止......");</p> <p> }</p> <p> @SuppressWarnings("unchecked")<br /> public void contextInitialized(ServletContextEvent sce) {<br /> // TODO Auto-generated method stub<br /> System.out.println("系统启动加载......");</p> <p> springContext = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());<br /> SystemParamServicesImpl sysServices = (SystemParamServicesImpl)springContext.getBean("sysParamService");<br /> sysBean = sysServices.listAllParams();</p> <p> context = sce.getServletContext();</p> <p> context.setAttribute("sysParams", sysBean);<br /> }</p> <p> public static ApplicationContext getApplicationContext() {<br /> return springContext;<br /> } </p> <p>}<br />

说明 ：

SystemParamBean  放置我需要加载的系统参数

sysParamService  是我在 applicationContext.xml 中配置的从数据库中得到参数值的bean

当然不要忘记在 web.xml 中添加

<listener><br /> <listener-class><br /> com.chain.store.mutual.LoadConfiguration<br /> </listener-class><br /> </listener>  

在Action 中得到系统参数：

ServletContext context = ServletActionContext.getServletContext();<br /> SystemParamBean sysBean = (SystemParamBean)context.getAttribute("sysParams");</p> <p> System.out.println("----------系统参数----------");<br /> System.out.println("NEWS_SHOWIMG " + sysBean.getNEWS_SHOWIMG());<br /> System.out.println("---------------------------");  

参考文章 ：

http://hi.baidu.com/29163077/blog/item/b3b77bdd5c1a94ea76c638f7.html

http://lichengyezi.javaeye.com/blog/508128